Remove Constant Variables

Constant variables are variables with the same value in all samples. This function is equivalent to remove_low_var(x, var_cutoff = 0, by = by, strict = strict).

Usage

remove_constant(x, by = NULL, strict = FALSE)

Arguments

x

Either a glyexp_experiment object or a matrix.

by

Either a column name in sample_info (string) or a vector specifying group assignments for each sample.

strict

If FALSE, remove a variable only if it is constant in all groups. If TRUE, remove a variable if it is constant in any group. Defaults to FALSE.

Value

For glyexp_experiment input, returns a modified glyexp_experiment object. For matrix input, returns a filtered matrix.

See also

remove_low_var()